CN2802001Y

CN2802001Y - Anti-theft device

Info

Publication number: CN2802001Y
Application number: CN 200520111109
Authority: CN
Inventors: 虞丛丛
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-07
Filing date: 2005-07-07
Publication date: 2006-08-02
Anticipated expiration: 2015-07-07

Abstract

The utility model relates to an anti-theft device. The inner part of an insulated outer box is connected with two circuits, one of the circuits is used for controlling an electromagnet and the other circuit is used for controlling an alarm and a doorbell. In the circuit which is used for controlling an electromagnet, a power supply, a power switch, the electromagnet and a cipher code switch set are successively connected in series and every cipher code of the cipher code switch set is connected in series. One end of the electromagnet is near by a spring piece device, and one surface of the electromagnet which is back on to the spring piece device is provided with a thin metal rod which is transversely penetrated through a lock hole. In another circuit, a power supply, the power switch, the cipher code switch set, a single-pole double-throw switch and an alarm are successively connected in series, a doorbell and the alarm are connected in parallel and every cipher code switch of the cipher code switch set is connected in parallel. The two circuits share the power switch and the cipher code switch set. When the single-pole double-throw switch is switched at the alarm end, the cipher code is shifted to correct, the power switch is closed and then the thin metal rod which is originally transversely penetrated through the lock hole is sucked out of the lock hole. In this way, a key can be taken out to open a door. If the cipher code is wrong, after the power switch is closed, the warning is initiated.

Description

Anti-theft device

Affiliated technical field:

The utility model relates to a kind of anti-theft device, especially has the anti-theft device of alert device and doorbell.

Background technology:

At present, the security door great majority of selling on the market strengthen anti-theft feature by increasing the quantity of locking or increasing the complexity of lock ﹠ key or load onto electronic password lock.But coded lock is easily opened by " password master-hand ", and other lock is also easily opened with MASTERKRY by the thief.

Summary of the invention:

Can't prevent the deficiency opened by MASTERKRY and " password master-hand " in order to overcome existing security door, the utility model provides a kind of anti-theft device.This anti-theft device can not only prevent that security door from being opened by MASTERKRY and " password master-hand ", and has alarm, doorbell and dial out the function of coded lock by examination.

The technical scheme that its technical problem that solves the utility model adopts is: be associated with two circuit in the box outside an insulation, a control electromagnet, another control alarm buzzer and doorbell.In the circuit of control electromagnet, power supply, a power switch and a cipher switch group series connection, each cipher switch series connection in the cipher switch group, one can be detected and show whether last electric energy supports enough that the detector of anti-theft device work is in parallel with power supply, one section close shrapnel device of electromagnet, the shrapnel device one side of electromagnet dorsad has root to cross the thin metal bar of lockhole.In another circuit, alarm buzzer and doorbell lay respectively on two branch roads connecting by power supply one utmost point, and all can link to each other in the cipher switch group by a single-pole double-throw switch (SPDT), and another extremely links to each other cipher switch and power supply.Two shared power switches of circuit and a cipher switch group.When single-pole double-throw switch (SPDT) is got to alarm buzzer one end, as long as dial to password, behind the closed power switch, the circuit shrapnel device that will connect the control electromagnet just can just can be drawn onto electromagnet one end, makes the thin metal bar that originally crosses lockhole be pulled out lockhole, and just can take out key and open the door this moment, if original password of dialling is not right, behind the then closed power switch, the circuit of control alarm buzzer is switched on, and alarm buzzer gives the alarm.When single-pole double-throw switch (SPDT) was got to doorbell one end, closed power switch will send the sound of doorbell.Cipher switch is pushed in examination aside: when any one control acoustic(al) switch was disconnected in the control acoustic(al) switch group, the password correctness on the cipher switch of whichever switch correspondence can not cause alarm, can not connect the circuit of control electromagnet simultaneously yet.Therefore, as long as the user remembers the password of other control acoustic(al) switch correspondence, just can when forgetting other password, under the situation that does not trigger alarm, give password for change by repeatedly trying to dial.The structure of cipher switch is: two row's numerals about having on the cipher switch are arranged in order from 0-9; The corresponding sheet metal of each numeral, each sheet metal links to each other with a switch respectively.Cipher switch is connected into circuit by these switches.When password is set, power switch is disconnected, make the respectively corresponding numeral of arrow mark on each cipher switch again, then, the switch corresponding with these numerals got on the circuit of control electromagnet, and the switch that other numeral is corresponding is got on the circuit of control alarm and doorbell.At last, single-pole double-throw switch (SPDT) is got to alarm buzzer one end.

The beneficial effects of the utility model are, not only reduced the possibility that security door is opened by MASTERKRY or " password master-hand ", but also increased the function that coded lock is pushed in alarm, doorbell and examination aside, when strengthening theftproof, reduced that the user should not remember password clearly and the possibility of not opening door.

Description of drawings:

Below in conjunction with drawings and Examples the utility model is further specified.

Figure one is circuit theory diagrams of the present utility model.

Among the figure: 1, power supply, 2, power switch, 3, control acoustic(al) switch group, 4, the cipher switch group, 5, single-pole double-throw switch (SPDT), 6, alarm buzzer, 7, doorbell, 8, electromagnet, 9, shrapnel device, 10, lockhole, 11, Power supply detector

The specific embodiment:

In the circuit of control electromagnet (8), power supply (1), power switch (2), electromagnet (8), cipher switch group (4) series connection, each cipher switch series connection in the cipher switch group (4), power supply (1) is in parallel with Power supply detector (11).In the circuit of control alarm buzzer (6) and doorbell (7), power supply (1), power switch (2), cipher switch group (4), single-pole double-throw switch (SPDT) (5) series connection, alarm buzzer (6) is in parallel with doorbell (7), single-pole double-throw switch (SPDT) (5) can link to each other with alarm buzzer (6) or doorbell (7), each cipher switch parallel connection in the cipher switch group (4), power supply (1) is in parallel with Power supply detector (11).Each cipher switch is all got to " 0 " position in the cipher switch group (4), power switch (2) closure, and circuit is connected, and electromagnet (8) holds shrapnel device (9), and the thin metal bar on the shrapnel device (9) is pulled out lockhole (10).At this moment, just can take out key has opened the door.Single-pole double-throw switch (SPDT) (5) is got to alarm buzzer (6) one ends, and the cipher switch group is not got to the tram to all cipher switchs in (4), power switch (2) closure, and circuit is connected, and alarm buzzer (6) gives the alarm.

Cipher switch is pushed in examination aside: when any one control acoustic(al) switch was disconnected in the control acoustic(al) switch group (3), the password correctness on the cipher switch of whichever switch correspondence can not cause alarm, can not connect the circuit of control electromagnet (8) simultaneously yet.Therefore, as long as the user remembers the password of other control acoustic(al) switch correspondence, just can when forgetting other password, under the situation that does not trigger alarm, give password for change by repeatedly trying to dial.

Claims

1, a kind of anti-theft device is outside insulation in the box, the circuit of a control electromagnet and the circuit of control alarm buzzer and doorbell are housed, it is characterized in that: in the circuit of control electromagnet, power supply is connected with power switch, power switch and electromagnet series connection, electromagnet and the series connection of cipher switch group, each cipher switch series connection in the cipher switch group, electromagnet one end is near a shrapnel device, and the shell fragment one side of electromagnet dorsad has a thin metal bar that crosses lockhole; In the circuit of control alarm and doorbell, power supply one utmost point is connected with power switch, power switch is connected with the cipher switch group, each cipher switch parallel connection in the cipher switch group, the cipher switch group is connected with a single-pole double-throw switch (SPDT), single-pole double-throw switch (SPDT) can link to each other with alarm buzzer or doorbell, and alarm buzzer is in parallel with doorbell, and all another extremely links to each other with power supply.